. >> on the east coast, heroin doesn't come from afghanistan or southeast asia anymore. >> you're holding $2 million worth of heroin in my hand. >> now it's coming from the place made famous by cocaine and pure enough to kill. >> that one time that somebody makes a decision to use it, it's like playing russian roulette with your life. >> it's big business coming into the country hidden in unbelievable ways. what's the strangest thing you've seen in heroin smuggling? >> it has to be the liquid heroin inside the puppies. >> and a controversial heroin overdose antidote. you'll see it bring a user back from the edge of death. >> there he is. back from the dead. >> heroin, a deadly drug and a business that is still flourishing and recruiting new customers every day. our kids. >> i watched two of my friends die from it. >> the parents like to say it's not happening so we close our eyes and kids continue to die. >> heroin is one of the most addictive drugs known. it's cheap. it's easy to get. once a user is hooked, it can be for life. for the drug traffickers who deal in it, it's a hugely profit